Hello,

while trying to compile a code with cmake (GNU compiler 7.4 and cmake 3.6, 
latest cygwin), I got an error regarding mpicxx not being able to locate the 
library -lmpi_cxx.
This was kind of weird, as I had installed the same code in another machine 
some time ago (with GNU compiler 6.4 and cmake 3.3, cygwin version 2.8) and did 
not have this issue.

Then by navigating to the cygwin lib folder, I noticed that the file 
libmpi_cxx.dll.a was missing in the latest version (although the package 
Libs/libopenmpicxx1 seems to be installed).

After copying the library file from the previous version I am able to correctly 
install my code.

I am not sure whether this is a bug, or if I have to set up something else to 
let cygwin install the mpicxx library.

Regards,
Antonio Pio Rinaldi
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